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Subsea wellbore operations vessel

a wellbore and operations vessel technology, applied in special purpose vessels, floating buildings, transportation and packaging, etc., can solve the problems of undesired or required testing of each connection that has been made up the known process, time-consuming process, and inability to properly make up the connection, etc., to achieve the effect of increasing specific weight and overall mass, reducing the number of holes, and increasing the depth rating

Active Publication Date: 2017-10-26
ITREC BV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The patent describes a way to efficiently use space within a vessel and access equipment using an overhead crane. The design includes two rows of storage racks that run parallel to the first length racks, making it easy to access. The frame beams of the catwalk machine are connected with a transverse beam near the rear, and mobile transverse connectors are used to connect the frame beams at the front, allowing for a shorter catwalk machine frame and more flexible positioning of equipment.

Problems solved by technology

It has been found that this known process to assembly a riser string is time-consuming.
In particular a great deal of effort has to be made to properly make up the connections between the connector fitting arrangements of the riser sections.
In particular in view of desired or required testing of each connection that has been made up the known process is undesirably slow.

Method used

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  • Subsea wellbore operations vessel
  • Subsea wellbore operations vessel
  • Subsea wellbore operations vessel

Examples

Experimental program
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Embodiment Construction

[0163]FIG. 1 shows a mono-hull vessel 1 having a hull 2 with a bow 3, a stern 4, and a moonpool 5 that extends through the hull 1.

[0164]The vessel 1 is adapted to perform subsea wellbore related operations involving a riser string between the subsea wellbore and the vessel, in particular drilling operations, e.g. for exploratory drilling. The vessel can also perform other subsea wellbore related operations, e.g. wellbore intervention.

[0165]In this example, the vessel 1 has an accommodation topside 6 at the bow 3, including crew quarters and a bridge.

[0166]The vessel 1 has an engine room 7, generally below the accommodation topside, with exhausts 7a extending at the rear of the topside 6, above the topside 6.

[0167]The moonpool 5 has, as is preferred, a rectangular shape with opposed lateral sides, a front side and a rear side.

[0168]A front main deck 8 extends between the moonpool 5 and the topsides.

[0169]A rear main deck 9 extends between the moonpool 5 and the stern of the vessel 4....

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Abstract

A vessel is adapted to perform subsea wellbore related operations involving a riser string between the subsea wellbore and the vessel, e.g. drilling and / or wellbore intervention. The vessel includes a hull having a deck, and a riser storage hold present within the hull below the deck. The riser storage hold includes storage racks adapted to store therein parallel stacks of multiple riser sections and / or pre-assembled riser stands in horizontal orientation. The vessel has an elongated riser transfer opening between the deck and the roof, the riser transfer opening extending in a direction parallel to the storage racks, the riser transfer opening having a length and a width so as to allow for transfer of a single riser section or a single riser stand in horizontal orientation via the riser transfer opening out of and into the riser storage hold, wherein the risers' handling system is suitable to work at the same time with two different lengths.

Description

FIELD OF THE INVENTION[0001]The present invention relates to a vessel adapted to perform subsea wellbore related operations involving a riser string between the subsea wellbore and the vessel, e.g. drilling and / or wellbore intervention.[0002]The present invention also relates to a riser string extending between a vessel and a subsea wellbore.BACKGROUND OF THE INVENTION[0003]In the prior art it is common to store the multiple riser sections from which the subsea riser string is composed in a riser storage of the vessel.[0004]Commonly a riser section comprises a riser pipe and in many known embodiments additionally one or more satellite or peripheral pipes on the outside of and along the riser pipe. The satellite pipes are e.g. used as fluid lines to a BOP or other subsea equipment, e.g. choke lines, kill lines, hydraulic lines, booster lines, injection lines (e.g. for glycol), etc. Each riser section comprises a connector fitting arrangement at each end thereof. For example the conne...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): B63B35/44E21B19/15E21B19/00B63B35/00
CPCB63B35/4413E21B19/004E21B19/00B63B35/00E21B19/155
Inventor ROODENBURG, JOOPWIJNING, DIEDERICK BERNARDUS
Owner ITREC BV
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